Heritage Open Day: Explore the buildings and lifestyle of the notorious Border Reivers, at the Heritage Centre and beyond. The Reivers lived by raiding each other’s livestock and possessions, and you can still see their fortified buildings in the landscape. Tynedale and Redesdale were notorious for reiving activities, between the late 1200s and the early 1600s. Families such as the Armstrongs, Elliots, Grahams and Forsters formed tight-knit clans or “graynesâ€, relying on mutual protection and often raiding neighbouring families. The term “blackmail†originates from their practice of extracting payments for protection and “bereaved†from the practice of setting fire to the property of neighbours as a hint that they should move on.